<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>HelloWorld</title>
    <script type="text/javascript" src="../assets/js/vue.js"></script>
</head>
<body>
    <h1>v-on 实例 -计分器</h1>
    <hr>
    <div id="app">
      本场比赛得分:{{ fenshu }}
      <p>
          <button v-on:click="jiafen" >加分</button>
          <button @click="jianfen" >减分</button>
          <br>
          <input type="text"v-on:keyup.enter="onEnter" v-model="fenshu2">
          <input type="text"v-on:keyup.13="onEnter" v-model="fenshu2">
      </p>
    
    </div>
    <script type="text/javascript">
        var app = new Vue({
            el:'#app',
            data:{
                fenshu : 0,
                femshu2:1,
                //尽量少用这种标签,会引起黑客的xss攻击
                dodo: '<h2>hello world!<h2>'
              
            },
            methods:{
                jiafen:function(){
                    this.fenshu++;
                },
                jianfen : function(){
                    this.fenshu--;
                },
                onEnter : function(){
                    //还可以绑定键盘码
                    this.fenshu = this.fenshu + parseInt(this.fenshu2)
                }
            }
       
        });    
      
    </script>
</body>
</html>